component App with ES6 or not with ES6

App.js

import React from 'react';
const App = () => (
  <div>
    <AddTodo />
    <VisibleTodoList />
    <Footer />
  </div>
)

//or

export default React.createClass({
  render() {
    return (
       <div>
    <AddTodo />
    <VisibleTodoList />
    <Footer />
  </div>
    );
  }
});